Ontrack Disk Manager memory consumption and relocation to UMBs?

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Ontrack Disk Manager memory consumption and relocation to UMBs?

Postby mega486 » 2019-1-16 @ 18:36

Hi all,

I'm playing around with Ontrack Disk Manager 9.57 to get a 32G CF card working with my 386 build. I have DOS 6.22 so I had it configured 4 partitions of 2G each. It's working great except that I notice it reduces DOS memory by around 15k. Is this typical? Also the manual says it can relocate much of itself to UMBs with the /L=2 parameter. Has anyone ever tried this with success? It doesn't seem to do anything with my build. I do have EMM386 loaded and can load mouse or cd-rom drivers into UMBs with no issue. This is not about loading the ONTRACKD.SYS driver, but the disk overlay itself, which is loaded by MBR and before DOS I assume. Technically I would be very impressed if this is actually feasible at all. :exclamation:
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Re: Ontrack Disk Manager memory consumption and relocation to UMBs?

Postby GigAHerZ » 2019-1-16 @ 19:10

As far as i know, disk overlay software does not consume memory.

What "mem /c/p/a" shows? (you can also export it to a file for later investigation: mem /c/a > report.txt)
"640K ought to be enough for anybody." - And i intend to get every last bit out of it even after loading every damn driver!
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Re: Ontrack Disk Manager memory consumption and relocation to UMBs?

Postby keropi » 2019-1-16 @ 19:32

yes diskmanager steals some ram to work, no way around it
maybe use XT-IDE bios with some nic to load it, works better
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Re: Ontrack Disk Manager memory consumption and relocation to UMBs?

Postby konc » 2019-1-17 @ 08:46

Try different DDO software, not all of them reserve so much memory. IF I remember correctly, a version of EZ-Drive that I'm using reserves about half of Ontrack.

edit: according to this, EZ-Drive 9.x uses 5KB
http://site.iendraguignan.free.fr/telec ... tm#memory1
Last edited by konc on 2019-1-17 @ 09:48, edited 1 time in total.
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Re: Ontrack Disk Manager memory consumption and relocation to UMBs?

Postby GigAHerZ » 2019-1-17 @ 09:12

Well, seems i'm wrong...

How can i check how much DDO software uses memory? mem command doesn't seem to show anything...

(I've been happily using OnTrack 9.57 on my 386, but if i want to max out everything, i might want to replace the DDO software for more free memory...)
"640K ought to be enough for anybody." - And i intend to get every last bit out of it even after loading every damn driver!
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Re: Ontrack Disk Manager memory consumption and relocation to UMBs?

Postby mega486 » 2019-1-17 @ 23:04

GigAHerZ wrote:Well, seems i'm wrong...

How can i check how much DDO software uses memory? mem command doesn't seem to show anything...

(I've been happily using OnTrack 9.57 on my 386, but if i want to max out everything, i might want to replace the DDO software for more free memory...)


What's your mem/c/p reporting? You need to check the total conventional memory column. Mine with Ontrack is only 640000 bytes. Ontrack manual says with relocation it can move all but around 80 bytes to UMBs, but I was not able to do that.

You need to be sure ontrack is enabled, though. If it doesn't find any disk with DDO, it'll not using any memory.
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Re: Ontrack Disk Manager memory consumption and relocation to UMBs?

Postby mega486 » 2019-1-17 @ 23:11

keropi wrote:yes diskmanager steals some ram to work, no way around it
maybe use XT-IDE bios with some nic to load it, works better


I didn't realize the SIIG EIDE card I have around actually supports disks up to 8.4G. I tried it yesterday and it works great except for some reason the BIOS on this card reserve 2k from DOS. So I end up with 638K for now.
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Re: Ontrack Disk Manager memory consumption and relocation to UMBs?

Postby GigAHerZ » 2019-1-20 @ 19:55

mega486, you are right! Some conventional memory just doesn't exist for DOS.

My mem /c/a is clean from any drive overlays, but with ontrack i had ~15000 bytes lost from total conventional memory. With EzDrive, i have ~5000 bytes lost from total.

Thank you! I have moved over from OnTrack to EzDrive because of that.
"640K ought to be enough for anybody." - And i intend to get every last bit out of it even after loading every damn driver!
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Re: Ontrack Disk Manager memory consumption and relocation to UMBs?

Postby GigAHerZ » 2019-5-10 @ 07:05

Slight resurrection.

Just found out that EzDrive has a ezmem.sys, that you can load in the beginning of config.sys that frees up the ~5000 bytes the EzDrive overlay initially takes. (Probably moves it away to somewhere else)

So you can have DDO (the cake) and have the full 640kB of conventional memory. (and eat it too)
"640K ought to be enough for anybody." - And i intend to get every last bit out of it even after loading every damn driver!
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